Developmental dyslexia: Electrophysiological evidence of clinical subgroups

Itzhak Fried, Peter E. Tanguay*, Elena Boder, Catherine Doubleday, Marcia Greensite

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Event-related potentials (ERPs) to word and to musical-chord stimuli were recorded in 13 dyslexic boys and 13 age-matched normal readers. Normal readers and dyslexics whose reading handicaps involved visual-spatial processing deficits had greater word versus musical-chord ERP waveform differences over the left as compared to the right hemisphere. Dyslexics whose reading difficulties were related to auditory-verbal processing deficits did not exhibit this asymmetry. These results are interpreted as supportive of the hypothesis that the latter group of dyslexics has failed to develop normal left hemisphere specialization for processing of auditory-linguistic material.

Original languageEnglish
Pages (from-to)14-22
Number of pages9
JournalBrain and Language
Issue number1
StatePublished - Jan 1981
Externally publishedYes


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